JP3991227B2 - 光ヘッド装置 - Google Patents
光ヘッド装置 Download PDFInfo
- Publication number
- JP3991227B2 JP3991227B2 JP2003381979A JP2003381979A JP3991227B2 JP 3991227 B2 JP3991227 B2 JP 3991227B2 JP 2003381979 A JP2003381979 A JP 2003381979A JP 2003381979 A JP2003381979 A JP 2003381979A JP 3991227 B2 JP3991227 B2 JP 3991227B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- strips
- laser
- optical
- laser beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
- G11B7/1263—Power control during transducing, e.g. by monitoring
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1362—Mirrors
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Description
方向に沿って曲率を有し、該楕円ビームの長軸方向に沿って曲率を有さない曲面にされ、且つ、上記2個の帯状片の反射面がそれぞれ同一方向を向いた状態より互いに中央側に傾いた状態にされている構成とした。
11 半導体レーザ(レーザ出力手段)
12 コリメータレンズ
13 反射板
13A,13B 帯状片
13C 支持片
13D 止着片
14 APC用光センサ
14b 集光レンズ
15 回折格子
16 プリズム
17 PBS
18 1/4波長板
19 立上げミラー
20 対物レンズ
21 対物レンズ駆動装置
22 集光レンズ
23 円筒レンズ
24 8分割センサ
30 フレーム枠
31 放熱板
Claims (1)
- 光ディスクの記録面にレーザ光を照射してデータの読出し又は書込みを行う光ヘッド装置において、
楕円のビーム形状を有するレーザ光を出力する半導体レーザと、
該半導体レーザから出力されたレーザ光を平行光にするコリメータレンズと、
一方の面が反射面にされた2個の帯状片と、これら2個の帯状片の各々の片側を支持する1個の支持片と、この支持片の一端側に張り出して光ヘッド装置のフレーム枠に止着される止着用片とが一体的に形成された反射体と、
上記2個の帯状片から反射される光の強度を検出する光センサとを備え、
上記光センサには集光用のレンズが設けられ、
上記2個の帯状片が上記半導体レーザと上記コリメータレンズとの間で上記レーザ光の光軸を挟んだ状態で互いに間隔を開け、各帯状片の長手方向が上記レーザ光の楕円ビームの短軸方向と同一の方向を向くように並んで配置され、
さらに、上記2個の帯状片は、上記レーザ光の楕円ビームの長軸方向に沿って曲率を有さず、該楕円ビームの短軸方向に沿って曲率を有する曲面にされ、且つ、上記2個の帯状片の反射面がそれぞれ同一方向を向いた状態より互いに中央側に傾いた状態にされていることを特徴とする光ヘッド装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003381979A JP3991227B2 (ja) | 2003-11-12 | 2003-11-12 | 光ヘッド装置 |
US10/985,039 US7593308B2 (en) | 2003-11-12 | 2004-11-10 | Optical head device capable of detecting the output laser beam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003381979A JP3991227B2 (ja) | 2003-11-12 | 2003-11-12 | 光ヘッド装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005149564A JP2005149564A (ja) | 2005-06-09 |
JP3991227B2 true JP3991227B2 (ja) | 2007-10-17 |
Family
ID=34587240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003381979A Expired - Fee Related JP3991227B2 (ja) | 2003-11-12 | 2003-11-12 | 光ヘッド装置 |
Country Status (2)
Country | Link |
---|---|
US (1) | US7593308B2 (ja) |
JP (1) | JP3991227B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4811711B2 (ja) * | 2005-11-11 | 2011-11-09 | コニカミノルタオプト株式会社 | レンズ鏡胴及び撮像装置 |
JP2008065890A (ja) * | 2006-09-06 | 2008-03-21 | Hitachi Media Electoronics Co Ltd | 光ピックアップ装置及びそれを備える光ディスク装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS567250A (en) | 1979-07-02 | 1981-01-24 | Hitachi Ltd | Optical recording and reproducing device |
JPH0372683A (ja) * | 1989-08-11 | 1991-03-27 | Toshiba Corp | 反射型センサ |
JPH04330646A (ja) | 1991-05-01 | 1992-11-18 | Nippon Conlux Co Ltd | 光学式情報記録再生装置のレーザ出力制御装置 |
JPH06309685A (ja) | 1993-04-26 | 1994-11-04 | Nippon Conlux Co Ltd | 光学式情報記録再生装置のレーザ出力制御装置 |
JPH11134705A (ja) | 1997-10-27 | 1999-05-21 | Asahi Optical Co Ltd | 光検出器及びそれを用いた光制御装置 |
JPH11273119A (ja) | 1998-03-24 | 1999-10-08 | Pioneer Electron Corp | 光学式ピックアップ装置 |
JP2001084635A (ja) | 1999-09-10 | 2001-03-30 | Toshiba Corp | 光ディスク装置 |
JP2002319699A (ja) | 2001-04-23 | 2002-10-31 | Ricoh Co Ltd | 光学装置 |
US7218591B2 (en) * | 2002-04-17 | 2007-05-15 | Sharp Kabushiki Kaisha | Optical pickup apparatus |
-
2003
- 2003-11-12 JP JP2003381979A patent/JP3991227B2/ja not_active Expired - Fee Related
-
2004
- 2004-11-10 US US10/985,039 patent/US7593308B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2005149564A (ja) | 2005-06-09 |
US7593308B2 (en) | 2009-09-22 |
US20050109915A1 (en) | 2005-05-26 |
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